Year	current US$
2005	36873258675.8626
2006	38381291445.0148
2007	37268596756.8508
2008	26378895928.9012
2009	15096180538.3716
2010	17460756504.3316
2011	15714719573.6073
2012	14479604249.4888
2013	24674409653.7138
2014	33851272520.0209
2015	33478469645.5415
2016	36728723956.0926
2017	40971157840.6925
2018	44791955092.9842
2019	50766589677.4569
2020	45449569335.8292
2021	77032773200.5693